The system itself. It seems like the hydraulics failed because the computers on IFT-2 got destroyed in fires/engine failures
During ascent, the vehicle sustained fires from leaking propellant in the aft end of the Super Heavy booster, which eventually severed connection with the vehicle’s primary flight computer. This led to a loss of communications to the majority of booster engines and, ultimately, control of the vehicle.
Was it the launchpad explosion on ift 1 that broke the hydraulics? Or was that an issue with the system itself?
The system itself. It seems like the hydraulics failed because the computers on IFT-2 got destroyed in fires/engine failures
https://www.spacex.com/updates/index.html